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(No Model.)

T. M. JARMAIN. OIL FLAME FURNACE.

No. 440,038. Patented Nov. 4, 1890.

UNITED STATES PATENT OFFICE.

THOMAS M. JARMAIN, OF LONDON, ENGLAND.

OIL-FLAME FURNACE.

SPECIFICATION forming part of Letters Patent No. 440,038, dated November 4, 1890.

Application filed July 5, 1890- Serial No. 357,834- (No model.)

To all whom it may concern.-

Be it known that I, THOMAS l\/IARTIN J AR- MAIN, a citizen of England, residing at Page Street Works, Westminster, in the county of London, England, have invented a new and useful Oil-Flame Furnace, of which the following is a specification.

My invention relates to a furnace heated by an oil-flame directed by a steam-jet, the furnace being so arranged that it may be either stationary or can be moved from place to place on wheels, so as to be used locally for forging, melting, or other heating purposes.

The accompanying drawing is a vertical section of a furnace according to my invention, arranged on a wheeled truck, so that it can be moved from place to place;

On an iron base A, which may rest on the ground or may be mounted on wheels, as shown, I build in fire-brick or other refractory material, inclosed in iron casing, a furnace-chamber B, having a side door I), by which objects to be heated can be introduced or withdrawn and having three outlets c, of which two are shown leading to an annular chimney C. At the side of the furnace and on the same base A, I place a water-tank D, and above it an oil-tank E. These tanks, instead of being on the base A, may be situated elsewhere when the furnace is not intended to be moved from place to place. The tank D is partly filled with water and partly with air, which by means of a hand-pump ol is compressed, causing water to ascend the pipe d, past a regulating-valve (l through a pipe 01- to an annular pipe d, and thence by several branches d into an annular boiler F. From the oil-tank E oil passes a regulatingvalve e and a throttle-valve c, governed by a float e to a pipe c and through its mouth at a low level e into a basin G, where it remains at a constant level by the action of the float e and valve e, acting in conjunction with the mouth e and with an air -escape pipe e In the center of the basin G there is a tubular conoidal boss 9, standing up above the level of the oil. The upper edge g of the basin G is notched or perforated, and on it rests a pipe-coilf, the lowest convolution of which communicates by a pipe f with the annular boiler F. Its uppermost convolution terminates in a central nozzle f with a jethole directed downward. The coil f is surmounted by a central air-tube f which extends up above the top of the chimney C.

At first starting the apparatus into action the oil in the basin G is ignited and burns with a dull flame over its surface, air getting access to it through the notches or perforations at g. This flame heats the coil f, and:

water being allowed to pass the valve (l and to reach the coil f, steam is generated, which, issuing in a jet from f directs the oil-flame downward through the boss g, drawing air by its ejector action down the tube f The flame descending within the annular boiler F generates steam therein, and this steam ascends by f to the coil f, in which it gets a certain amount of superheating before it issues from the nozzle f The flame directed downward into the furnace-chamber B heats objects placed therein, the products of combustion escaping by the outlets c and chimney O and heating the air descending the tube f to supply the flame. Thus, when the parts become heated a very powerful furnaceflame is obtained.

Having thus described the nature of my invention and the best means I know of carrying the same into practical effect, I claim- In an oil-flame furnace, the combination of a water-tank having an air-compressing pump and regulating-valve for delivering water under pressure, an oil-tank with regulating and float valves for delivery of oil, an oil-basin with central tubular boss, having under it an annular boiler and above it a pipe-coil with downwardly-directed steam-jet nozzle, a pipe communicating with said coil and annular boiler, and a furnace-chamber with outletfines leading to annular chimney surrounding air-supply tube, arranged and operating substantially as described.

In testimony whereof I have signed my name to this specification,'in the presence of two subscribing witnesses, this 25th day of June, A. D. 1890.

THOMAS M. JARMAIN.

Witnesses:

OLIVER IMRAY, Patent Agent, 28 Southampton Buildings,

London, W. 0..

J NO. P. M. MILLARD, Clerk to Messrs. Abel ct Imray, Consulting Engmeers and Patent Agents, 28 Southampton Buildings, London, VV. 0. 

